My coworkers frequently joke about either being fired or who's going to quit next at work. They often bring up stories about predecessors who quit or got fired and why. It unfortunately seems to be one of their main conversation topics at lunch.
Our sales team has a high turnover rate. We've had 4 people quit in the last 2 months...and we're a team of about 18 people. My coworker recently succeeded with her 12 month confirmation in her sales role, but still likes to say "so now that ___ has just quit, who's next?" and proceeds to jokingly ask each person around her if they will quit next.
For context, these coworkers gossip a lot about others in the team. They'll talk about other sales reps' performance, current percentage to targets (mostly their gaps), and in my view, it doesn't seem that these coworkers want the other reps that they talk about to succeed.
To be honest, I really feel uncomfortable when they joke about being fired and who's going to quit so often. I like my job and want it to be stable, I don't want to constantly be reminded of the possibility of quitting or being fired.
How do I get them to stop joking about this so frequently? It doesn't create a very nice work environment.